roman: add convert to arabic

roman/roman.go

@@ -35,3 +35,7 @@ func ConvertToRoman(arabic int) string {
 
 	return converted.String()
 }
+
+func ConvertToArabic(roman string) int {
+	return 1
+}

roman/roman_test.go

@@ -5,11 +5,10 @@ import (
 	"testing"
 )
 
-func TestRomanNemerals(t *testing.T) {
-	cases := []struct {
+var cases = []struct {
 	Arabic int
 	Roman  string
-	}{
+}{
 	{Arabic: 1, Roman: "I"},
 	{Arabic: 2, Roman: "II"},
 	{Arabic: 3, Roman: "III"},
@@ -39,7 +38,9 @@ func TestRomanNemerals(t *testing.T) {
 	{Arabic: 2014, Roman: "MMXIV"},
 	{Arabic: 1006, Roman: "MVI"},
 	{Arabic: 798, Roman: "DCCXCVIII"},
-	}
+}
+
+func TestRomanNemerals(t *testing.T) {
 	for _, test := range cases {
 		t.Run(fmt.Sprintf("%d gets converted to %q", test.Arabic, test.Roman), func(t *testing.T) {
 			got := ConvertToRoman(test.Arabic)
@@ -51,3 +52,16 @@ func TestRomanNemerals(t *testing.T) {
 		})
 	}
 }
+
+func TestConvertingToArabic(t *testing.T) {
+	for _, test := range cases[:1] {
+		t.Run(fmt.Sprintf("%q gets converted to %d", test.Roman, test.Arabic), func(t *testing.T) {
+			got := ConvertToArabic(test.Roman)
+			want := test.Arabic
+
+			if got != want {
+				t.Errorf("got %d, want %d", got, want)
+			}
+		})
+	}
+}